ISSP Sustainability Professional Certification, webinars, online courses, a sustainability professional’s body of knowledge, special reports, and resource directories are just a sampling of the rich content offered to members. Learn more here.


For-profit and non-profit organizations alike can bring their services and knowledge to ISSP members through enhanced access to a variety of ISSP assets, including our website, branding, social media, and webinar sponsorships.

In addition, Organizational Membership includes Individual Memberships for up to three people in your organization, and a discount for additional affiliated Individual Members. Learn more here. 

"Together we have the knowledge, skills, connections, and will to accomplish the necessary acceleration of sustainability strategies in all sectors.”

— Bob Willard, best selling author of The Next Sustainability Wave and The Sustainability Advantage, ISSP founding member


   "I’m proud to be part of that [ISSP].” 

 — Hunter Lovins, co-author of Natural Capitalism and President and Founder of Natural Capitalism Solutions



“It's an exciting time to be a sustainability professional, but it also can be overwhelming and lonely. As the greening of business has gone from the margins to the mainstream, there is a vital need to bring cohesion and credibility to the field. ISSP fills this gap by creating a space for professionals to sharpen their skills and learn from one another, helping all of us become more effective at finding solutions for our companies and clients.”

— Joel Makower, Executive Editor,, ISSP founding member